Electric motor structure



June 20, 1933. R. s. WHALEY ELECTRIC MOTOR STRUCTURE 'Filed Aug. 12, 195o NV EN T 4am/? @u ATTORNEY Patented June 20, 1.933 v UNITED sTATEs PATENT oEFlcE RALPH s. WHALEY, oF SEATTLE, WASHINGTON, AssIGNon TOTETEOLEUM HEAT' AND POWER COMPANY, oF NEW YORK, N. Y., A CORPORATION E DELAWARE ELEc'rmc moron sTEUc'rUEE Application illed August 12, 1930. Serial No. 474,718.

This invention is directed to an improvement in electric motor structures and relates particularly to certain structural details which are of advantage in oil burning appa-y tus in the field is facilitated, thereby making repairs and adjustments possible at the installation.

The drawing illustratesa sectional elevational view of an embodiment of my inven,

il tion. p

The apparatus to which this invention 1s directed is of the type employing a mechanically driven atomizing cup which I have des' ignated 1.

2 designates the outer shell or snoot of 'the burner head which is permanently secured to the furnace front and projects inwardly into the combustion chamber of the furnace. len th as to permit of the use of standard fire rick about the same thereby not only eliminating the expense of special firebrick 'but insuring proper insulation of the burner from the combustion chamber.

30 3 designates the burner nozzle s aced from the shell or snoot 2 so as to provi e an annu- A lar air channel4 for the flow of air about the,nozzle. The burner nozzle 3 and cup 1 are spaced from each other to provide a channel 5 surrounding the cup this channel permitting of the flow of air f the exterior of the cup to its tip.

Screwedupon'thelend of the nozzle 3 is a wide ring 3 which constitutes a continuation of the nozzle. This ring carries air deflectors 3 for imparting a whirling motion to the airpassing alongl the channel 5 to the burner tip.

The atomizing cu 1 above referred to is tends the entire leng of the burner. The

rotor of the fan 6 is also carried by this,

This shell or snoot is of such a rom a fan 6 along.

threaded upon a hol w shaft 16 which ex-k provided for that purpose on the shaft. .To remove the fan it is simply necessary to remove the atomizing cup, takeoff the front of the fanv housing and slip the fan off thel shaft. The shaft 16 alsoconstitutes the armature shaft of an electric motor, the armature of which is designated 19 and the field structure 20. The field structure is held Within the housing of the burner by set screws 18-. The armature 19 is mounted directly on the shaft 16 and heldV against turning with respect to the armature shaft 16 b'y a lock nut 21 threaded on the armature shaft, the nut forcing the armature against a shoulder 22v with which the shaft is provided. In order, therefore, to make repairs to the motor orto change the same, it is .merely necessary to4 remove the end bell 17 of the burner housing by removing the bolts 18, loosen the two set screws 18', back off'the nut '21, whereupon the armature and field coils may-be.

slipped out of the housing.

This construction is also novel in another respect in that the portion 23 of the starting switch for the electric motor which is of the split phase type is carried by the nut 21.

`Oil is supplied to the cup 1 through oil delivery pipe 24 which is threaded into a cap 25 bolted to the end plate 17 of the burner housing.'

-Intermediate the motor` and the fan 6 I provide a Worm 26 which is formed in a sleeve 27 mounted on the armature shaft 16 and a worm gear 28 cooperating with this worm the gear 28 being carried by the shaftv 29 for an Lpil pump by which oil is pumped to the pipe 2 At each end of the sleeve 27 I provide the bearings 3() for the armature shaft. These bearings are lubricated by oil which is carried to the worm 26 from the oil case or hous# ing in which the worm gear 28 is mounted and in order that the oil seeping to the bearings 30 may be filtered, packing 31 is provided adjacent each bearing and intermediate each bearing and the worm 26, this, packing sho being held in place by a sheet metal sleeve 32 I which surrounds the armature shaft and worm sleeve. This sleeve is held in place by ascrew 36 carried by the casting 33 forming a part of the burner housing. 34 desi a cap for the forward bearing 30 this cap being screwed upon the casting 33 of the housing. Consequently access may 'be had to this bearing simply by removing the cup 1, the fan rotor, the cap 34 and the nut 34 which is screwed directly on the armature shaft 16. Access may be had to the rear bearing 30 after the motor has been .removed by removing cap 35 which is threaded upon the casting 33 of the nut 35 which is screwed upon the shaft 16.

From the foregoing, therefore, it will be appreciated that I have provided a motor structure for oil burning apparatus wherein refractory of standard type, as distinguished from special refractory, may be employed about the burner snoot.

It will be appreciated also that this insures proper insulation of the burner from the combustion chamber. c

It will be appreciated also that I have provided a construction which makes for easy removal and assembly of the apparatus, it being a simple matter to remove almost any part of the apparatus in the field. As above pointed out the atomizing cup 1 and the rotor of the fan 6 are easily removable from the shaft 16 simply, in the iirst instance, by unscrewing the cup 1 from the shaft and in the second instance by removing the forward art of the fan housing whereupon the rotor o the fan may be slipped ofin the shaft. This is of advantage in this type of apparatus inasmuch as it provides for changing the capacity of the burner at any time it may be desired. In this same Vconnection it is to be noted that the ringv 3 which carries the air deflecting members 3 may readily be removed and replaced with a different type of deiector.

Attention has been called to the easy access that may be had to the bearings 30 for the shaft 16. I might note at this point that these twov bearings constitute the only bearings for this shaft. As I have already indicated access may be had to the forward of these two bearings 30 by removing the atomizing cup, the fan rotor and then unscrewing the cap 34 and nut 34', while access may be had to the 'rear of the 'bearings 30 simply by removing the cap 35 and nut 35 after the motor armature has been slipped oif the shaft.

It is to be understood that changes may be made Ain the details of construction above described within the purview of my invention.

What I claim is An electric motor structure comprising in combination an armature shaft, a shoulder on said shaft, an armature itting'said shaft, a nut on the shaft in contact with the armature for holding the same against said shoulder for rotation of the armature with the shaft, switching mechanism for the motor lcarried by said nut, a field structure, a housing for the motor to which the field structure is removremovably gnates ably attached and an end bell for thehousing secured to the housing.

This Specification Signed this 28m day of July, 1930.

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